Loads off diy on the web.
Read Alans book http://www.koikichi.com/alans-book/page-2.php
A wery good and balanced pro/con on differente aproaches on all matters in ornamental pond keeping, the rest off the siht is good in the grafics on flowpaterns (Getting in on the understanding of flow paterns) but makes you want to puke do to the banning of other solutions, by the promoter of "ERIC" (endless river in concrete) this is a good way, but by fare the only and final solution. If you have the skils tools and time it is a easy way, but go 1. generation (1. chamber empty long ras for setteling) its droped in the manufactured one only because you cant ship and sell a long empty chamber.
The biological go anoxic http://www.mankysanke.co.uk/html/anoxic_filtration.html
This woorks under the ice as the only biological filter I know off.
Iff you can opperate it on a airliftpump you have the best, cheapest investment and runing(constant) cost opperation on a pond.
You have to go DIY because this setup steal the best off differente worlds. (My opinione)A real hybrid filter.

Consider to go native on the fish speicie




Last edited by andedammen; 06/12/10 02:08 PM.
PAUL